Siemens Simatic S7-1500R System Manual page 238

The preview shows that the backup target is H-System_1.
For a backup, the redundant system S7-1500R/H must be in the STOP system state.
In the "Action" column, select the "Stop module" command from the drop-down menu.
Figure 9-15 Upload from device
Click "Upload from device" to start the backup.
Reference
You can find more information on the various types of backup in the STEP 7 online help.
Emergency address (emergency IP)
If you cannot access the CPU via the IP address, you can set a temporary emergency IP
address for the CPU. To the more information on emergency address options, please refer
to the Communication (https://support.industry.siemens.com/cs/ww/de/view/59192925/en)
function manual.
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
9.6 Backing up and restoring the CPU configuration
Commissioning
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